Method of and a device for doubling yarn on double twist spindles



April 1962 A. KRESSLEIN 3,

METHOD OF AND A DEVICE FOR DOUBLING YARN 0N DOUBLE TWIST SPINDLES FiledAug. 10, 1960 e 19 I s v V I 4 Jn'venfor: 5 MMQg W United States Patent3,029,587 METHOD OF AND A DEVICE FOR DGUBLING YARN 0N DOUBLE TWISTSPENDLES Albert Kresslein, 110 Goethestrasse, Kreteld, Germany FiledAug. 10, 1960, Ser. No. 48,601

Claims priority, application Germany Aug. 21, 1959 v 9 Claims. (Cl.57-6852) The present invention relates to a method of and a device fordoubling yarn on double twist spindles.

For doubling yarns on double twist spindles, it is as such already knownto use packages disposed the one above the other and to withdraw theyarn from the packages over-end or tangentially for passing them boththrough the hollow spindle axle. Difficulties arise in over-end draw-offinasmuch as the two yarns must travel through different distances andespecially the yarn withdrawn from the lower package experiences morefriction along its path of travel than the upper yarn, for instance byrubbing against the upper package. There is also some risk of the yarnsbecoming entangled. This risk is reduced if the yarns are withdrawntangentially from packages which are freely rotatable. However, even inthis latter arrangement the distance of travel of the yarns from bothpackages and their respective tensions differ, and this leads totrouble.

It is the object of the present invention to overcome the difficultiesinherent in known methods. The invention therefore proposes to draw offthe yarn over-end from the upper package and to feed the same into thehollow interior of the spindle from the top. The yarn from the lowerpackage is drawn off in the downward direction and introduced into thespindle tube for the purpose of combining it with the yarn from theupper package. This prevents the yarns from making contact duringdraw-01f from the packages. Moreover, the conditions of draw-off arealike for the yarns of both packages. The yarns remain separate untilthey come together in the tube, so that the actual process of twistingis performed within a very short distance.

The packages are stationary during this process. In some instances itmay be advisable to mount the packages in such manner that they arefreely rotatable, in which case the yarnis drawn oif tangentially.

For performing this method the invention proposes to use a device inwhich the hollow stem of the spindle is used for mounting the packages.This hollow stem is secured to the cover of a stationary package holderof known construction. The tubular cores of the packages are pushed onto the hollow stem from both ends on either side of the cover, that isto say from above and below.

The drawing illustrates a preferred embodiment of the invention in moreor less schematic form in vertical axial section. By reference to thisdrawing the method will be hereinafter explained and other features ofthe device described.

The double twist spindle in known manner comprises a spinner 1 and astationary package holder 2. Spinner 1 is mounted on the wharve 3.

The supporting plate 6 is mounted on the spindle tube 4 of the spinnerin ball bearings 5 and the package holder is secured to the plate. Inconventional manner the package holder is kept stationary by an insidemagnet 7 and an outside magnet 8.

The hollow stem 9 is utilised to carry the packages. It is secured tocover 10 of package holder 2, for instance by threads or by flanges andbolts. The tubular core 11 of the upper package 12 is pushed on to thehollow stem 9 from above and at the same time carries an entry cone 13which is detachable. The hollow core 14- of the lower package 15 ispushed on to the hollow 3,029,587 Patented'Apr. 17, 1962 M V 1C6 stem 9from below, and retained in position by a cap 16 secured to the tube bythreads or a press fit.

As will be readily understood the yarn 17 from the 7 upper package 12.is taken directly to the entry cone 13 and passes through the hollowstem 9 into the spindle tube 4 below. Yarn 18 which is withdrawn fromthe lower package 15 directly enters the spindle tube 4 where it iscombined with yarn 17 from package 12, both yarns together emerging fromthe slit in spinner 1 to form a balloon for twisting.

Cap 16 which has a central bore is also provided with a radial groove 19which extends to the central bore in the cap. Package holder 2 is formedwith a threading channel 20 which extends radially from the outsideinwards and which may be accessible from the top through a slit. Thisarrangement permits the yarn 18 from package 15 to be threaded. Thethreading tool is pushed through channel 20 and the yarn can then followthe tool through the slit. The threading tool is guided along groove 19in cap 16 so that it will reliably and properly enter spindle tube 4 andradially emerge through the spinner. Yarn 17 is threaded in the simpleconventional manner.

It may be advisable to afiix a braking ring 21 to cap 16 by means ofstays or the like, said braking ring taking elfect when the diameter ofthe lower package 15 has been considerably reduced. This createsconditions of draw-off which balance the conditions of draw-01f of yarni.e., to equalise the tension in the two yarns. The stationary brakingring 21 might be replaced by a braking blade which is dragged around bythe yarn.

It will thus be clear that the two yarns 17 and .18 will meet for thefirst time at the upper end of the spindle tube 4. Twisting is thereforeperformed in a very short distance, a circumstance which has aparticularly favourable effect.

The proposed method and device according to the invention are especiallysuitable for twisting staple fibre of natural and synthetic fibrematerials.

What I claim is:

1. The method of doubling on double twist spindles which carry yarnpackages disposed one above the other, in which the yarn from the upperpackage is drawn off over-end and passes downwards into a hollow stem ofthe spindle from above and the yarn from the lower package is drawn offin the downward direction and introduced into the spindle tube forcombination with the yarn from the upper package and the yarns are thentwisted together.

2. The method according to claim 1, in which the said packages are keptstationary.

3. The method of doubling on double twist spindles which carry yarnpackages disposed co-axially one above the other, which comprisesdrawing oif the yarn from the upper package over-end and passing itdownwards axially of the device to a spinner and drawing off the yarnfrom the lower package in the downward direction and guiding the twoyarns axially of the device below the lower package to the spinner sothat the two yarns come together and then twisting them together.

4. A double twist spindle device comprising a yarn package holdercomprising a hollow stem and adapted to support yarn packages co-axiallyone above the other, a spindle tube and spinner, and means for guidingthe yarn from the upper package drawn over-end down through the saidhollow stern and into the said spindle tube and means for guiding theyarn from the lower package drawn off in the downward direction alsointo the said spindle tube for joint passagethrough the spindle tube andtwisting.

5. A double twist spindle device according to claim 4, comprising aholder for the packages comprising a detacha-ble cover member secured tosaid stem, and means permitting a tubular core of each package to bepushed on the hollow stem one from one side and the other from the otherside of the said cover member into co-axial operative relationship.

6. A spindle device according to claim 4, said stem 7 ing a radial guidegroove for a threading tool, and said holder having a radial threadingchannel situated to enable yarn from the lower package to be drawn-offin the downward direction and to pass through the said channel, aspindle tube and spinner, said tube being situate so that the downwardlyextending yarn from the said channel can be led through the said tube tothe spinner, and said stern being associated at its upper end with meanspermitting yarn from the upper package to be drawn off such package overend and pass downward through the said stem and also enter the saidspindle tube so that 9. A double twist spindle device comprising a yarnpackage holder having an intermediate cover member and a hollow stemattached thereto, said holder being adapted to support yarn packagesco-axially one above and one below the-said cover member, a member toretain the lower package on the said hollow stern, said member havthetwo yarns meet at the top of the spindle tube and pass together throughthe tube for twisting.

References Cited in the file of this patent V ,UNITED STATES PATENTS2,442,775 Nelson June 8, 1948 FOREIGN PATENTS Great Britain of 1890 i ll

